/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.rchat.pocmini.bluetooth;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;


import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.UUID;

/**
 * This class does all the work for setting up and managing Bluetooth
 * connections with other devices. It has a thread that listens for
 * incoming connections, a thread for connecting with a device, and a
 * thread for performing data transmissions when connected.
 */
public class BluetoothChatService {
    // Debugging
    private static final String TAG = "BluetoothChatService";
    private static final boolean D = true;

    // Name for the SDP record when creating server socket
    private static final String NAME = "BluetoothChatService";

    // Unique UUID for this application
    private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");

    // Member fields
    private final BluetoothAdapter mAdapter;
    private final Handler mHandler;
    private AcceptThread mAcceptThread;
    private ConnectThread mConnectThread;
    private ConnectedThread mConnectedThread;
    private int mState;

    // Constants that indicate the current connection state
    public static final int STATE_NONE = 0;       // we're doing nothing
    public static final int STATE_LISTEN = 1;     // now listening for incoming connections
    public static final int STATE_CONNECTING = 2; // now init1iating an outgoing connection
    public static final int STATE_CONNECTED = 3;  // now connected to a remote device

    private BluetoothAdapter mBluetoothAdapter = null;

    //context
    private Context mContext;

    /**
     * Constructor. Prepares a new BluetoothChat session.
     *
     * @param context The UI Activity Context
     * @param handler A Handler to send messages back to the UI Activity
     */
    public BluetoothChatService(Context context, Handler handler) {
        mContext = context;
        mAdapter = BluetoothAdapter.getDefaultAdapter();
        mState = STATE_NONE;
        mHandler = handler;
    }

    /**
     * Set the current state of the chat connection
     *
     * @param state An integer defining the current connection state
     */
    private synchronized void setState(int state) {
        if (D) Log.d(TAG, "setState() " + mState + " -> " + state);
        mState = state;

        // Give the new state to the Handler so the UI Activity can update
        mHandler.obtainMessage(BluetoothChat.MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
    }

    /**
     * Return the current connection state.
     */
    public synchronized int getState() {
        return mState;
    }

    /**
     * Start the chat service. Specifically start AcceptThread to begin a
     * session in listening (server) mode. Called by the Activity onResume()
     */
    public synchronized void start() {
        if (D) Log.d(TAG, "start");

        // Cancel any thread attempting to make a connection
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Start the thread to listen on a BluetoothServerSocket
        if (mAcceptThread == null) {
            mAcceptThread = new AcceptThread();
            mAcceptThread.start();
        }
        setState(STATE_LISTEN);
    }

    /**
     * Start the ConnectThread to initiate a connection to a remote device.
     *
     * @param address The BluetoothDevice to connect
     */
    public synchronized void connect(String address) {
//        if (D) Log.d(TAG, "connect to: " + device);

        // Cancel any thread attempting to make a connection
        if (mState == STATE_CONNECTING) {
            if (mConnectThread != null) {
                mConnectThread.cancel();
                mConnectThread = null;
            }
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Start the thread to connect with the given device
        mConnectThread = new ConnectThread(address);
        mConnectThread.start();
        setState(STATE_CONNECTING);
    }

    /**
     * Start the ConnectedThread to begin managing a Bluetooth connection
     *
     * @param socket The BluetoothSocket on which the connection was made
     * @param device The BluetoothDevice that has been connected
     */
    public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) {
        if (D) Log.d(TAG, "connected");

        // Cancel the thread that completed the connection
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Cancel the accept thread because we only want to connect to one device
        if (mAcceptThread != null) {
            mAcceptThread.cancel();
            mAcceptThread = null;
        }

        // Start the thread to manage the connection and perform transmissions
        mConnectedThread = new ConnectedThread(socket);
        mConnectedThread.start();

        // Send the name of the connected device back to the UI Activity
        Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_DEVICE_NAME);
        Bundle bundle = new Bundle();
        bundle.putString(BluetoothChat.DEVICE_NAME, device.getName());
        msg.setData(bundle);
        mHandler.sendMessage(msg);

        setState(STATE_CONNECTED);
    }

    /**
     * Stop all threads
     */
    public synchronized void stop() {
        if (D) Log.d(TAG, "stop");
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }
        if (mAcceptThread != null) {
            mAcceptThread.cancel();
            mAcceptThread = null;
        }
        setState(STATE_NONE);
    }

    /**
     * Write to the ConnectedThread in an unsynchronized manner
     *
     * @param out The bytes to write
     * @see ConnectedThread#write(byte[])
     */
    public void write(byte[] out) {
        // Create temporary object
        ConnectedThread r;
        // Synchronize a copy of the ConnectedThread
        synchronized (this) {
            if (mState != STATE_CONNECTED) return;
            r = mConnectedThread;
        }
        // Perform the write unsynchronized
        r.write(out);
    }

    /**
     * Indicate that the connection attempt failed and notify the UI Activity.
     */
    private void connectionFailed() {
        setState(STATE_LISTEN);

        // Send a failure message back to the Activity
        Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(BluetoothChat.TOAST, "无连接到打印机，请重试");
        msg.setData(bundle);
        mHandler.sendMessage(msg);
    }

    /**
     * Indicate that the connection was lost and notify the UI Activity.
     */
    private void connectionLost() {
        setState(STATE_LISTEN);

        // Send a failure message back to the Activity
        Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(BluetoothChat.TOAST, "设备连接断开");
        msg.setData(bundle);
        mHandler.sendMessage(msg);
    }

    /**
     * This thread runs while listening for incoming connections. It behaves
     * like a server-side client. It runs until a connection is accepted
     * (or until cancelled).
     */
    private class AcceptThread extends Thread {
        // The local server socket
        private final BluetoothServerSocket mmServerSocket;

        public AcceptThread() {
            BluetoothServerSocket tmp = null;

            // Create a new listening server socket
            try {
                tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
            } catch (IOException e) {
            }
            mmServerSocket = tmp;
        }

        public void run() {
            if (D) Log.d(TAG, "BEGIN mAcceptThread" + this);
            setName("AcceptThread");
            BluetoothSocket socket = null;

            // Listen to the server socket if we're not connected
            while (mState != STATE_CONNECTED) {
                try {
                    // This is a blocking call and will only return on a
                    // successful connection or an exception
                    socket = mmServerSocket.accept();
                } catch (IOException e) {
                    break;
                }

                // If a connection was accepted
                if (socket != null) {
                    synchronized (BluetoothChatService.this) {
                        switch (mState) {
                            case STATE_LISTEN:
                            case STATE_CONNECTING:
                                // Situation normal. Start the connected thread.
                                connected(socket, socket.getRemoteDevice());
                                break;
                            case STATE_NONE:
                            case STATE_CONNECTED:
                                // Either not ready or already connected. Terminate new socket.
                                try {
                                    socket.close();
                                } catch (IOException e) {
                                }
                                break;
                        }
                    }
                }
            }
            if (D) Log.i(TAG, "END mAcceptThread");
        }

        public void cancel() {
            if (D) Log.d(TAG, "cancel " + this);
            try {
                mmServerSocket.close();
            } catch (IOException e) {
            }
        }
    }

    int count = 10;

    /**
     * This thread runs while attempting to make an outgoing connection
     * with a device. It runs straight through; the connection either
     * succeeds or fails.
     */
    private class ConnectThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        private String macAddress = "";

        public ConnectThread(String mac) {
            macAddress = mac;
            BluetoothSocket tmp = null;

            if (mBluetoothAdapter == null) {
                mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
            }
            mmDevice = mBluetoothAdapter.getRemoteDevice(macAddress);
            mBluetoothAdapter.cancelDiscovery();

            // Get a BluetoothSocket for a connection with the
            // given BluetoothDevice
            try {
                tmp = mmDevice.createRfcommSocketToServiceRecord(MY_UUID);
            } catch (IOException e) {
            }
            // Get a BluetoothSocket for a connection with the
            // given BluetoothDevice
//            try {
//                tmp = mmDevice.createRfcommSocketToServiceRecord(MY_UUID);
//                Method m = mmDevice.getClass().getMethod("createRfcommSocket", new Class[] { int.class });
//                tmp = (BluetoothSocket) m.invoke(mmDevice, 1);
//            } catch (IOException e) {
//                Log.e(TAG, "create() failed", e);
//            } catch (Exception e) {
//				// TODO: handle exception
//            	Log.e(TAG, "create() failed", e);
//			}
            mmSocket = tmp;


        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectThread");
            setName("ConnectThread");

            // Always cancel discovery because it will slow down a connection
            mAdapter.cancelDiscovery();

            // Make a connection to the BluetoothSocket
            try {
                // This is a blocking call and will only return on a
                // successful connection or an exception
                mmSocket.connect();
            } catch (IOException e) {
                connectionFailed();
                // Close the socket
                try {
                    mmSocket.close();
                } catch (IOException e2) {
                }

                // Start the service over to restart listening mode
                BluetoothChatService.this.start();
                return;
            }

            // Reset the ConnectThread because we're done
            synchronized (BluetoothChatService.this) {
                mConnectThread = null;
            }

            // Start the connected thread
            connected(mmSocket, mmDevice);
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
            }
        }
    }

    /**
     * This thread runs during a connection with a remote device.
     * It handles all incoming and outgoing transmissions.
     */
    private class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;
        private int writeSize = 0;

        public ConnectedThread(BluetoothSocket socket) {
            Log.d(TAG, "create ConnectedThread");
            mmSocket = socket;

            InputStream tmpIn = null;
            OutputStream tmpOut = null;

            // Get the BluetoothSocket input and output streams
            try {
                tmpIn = socket.getInputStream();
                tmpOut = socket.getOutputStream();
            } catch (IOException e) {
            }
            writeSize = 0;
            mmInStream = tmpIn;
            mmOutStream = tmpOut;

        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectedThread");
            byte[] buffer = new byte[1024];
            int bytes;

            // Keep listening to the InputStream while connected
            while (true) {
                try {
                    // Read from the InputStream
                    bytes = mmInStream.read(buffer);
                    Log.i("READ", bytes + "");
                    // Send the obtained bytes to the UI Activity
                    mHandler.obtainMessage(BluetoothChat.MESSAGE_READ, bytes, -1, buffer)
                            .sendToTarget();
                } catch (IOException e) {
                    connectionLost();
                    break;
                }
            }
        }

        /**
         * Write to the connected OutStream.
         *
         * @param buffer The bytes to write
         */
        public void write(byte[] buffer) {
            try {
                int buffer_size = buffer.length;
                int offset = 0;
                int maxSize = 1024 * 1;
                Log.d(TAG, "WRITE!!!" + buffer.length);
                while (offset < buffer_size) {

                    int len = 0;
                    if (buffer_size - offset < maxSize) {
                        len = buffer_size - offset;
                    } else {
                        len = maxSize;
                    }
                    byte[] send = Arrays.copyOfRange(buffer, offset, offset + len);
                    offset += len;
                    mmOutStream.write(send);
                    writeSize += len;
                    if (writeSize >= maxSize) {
                        Log.d(TAG, "SLEEP!!!");
                        Thread.sleep(500);
                        writeSize = 0;
                    }
                }
//                mmOutStream.write(buffer);

                // Share the sent message back to the UI Activity
                mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer)
                        .sendToTarget();
            } catch (IOException e) {
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
            }
        }
    }

//    private boolean connecting = false;
//    private boolean connected = false;
//    private int connetTime = 0;
//    private  BluetoothDevice mmDevice;
//    private  BluetoothSocket socket;
//    
//    private class ConnectThread extends Thread {  
//        String macAddress = "";  
//      
//        public ConnectThread(String mac) {  
//            macAddress = mac;  
//        }  
//      
//        public void run() {  
//            connecting = true;  
//            connected = false;  
//            if(mBluetoothAdapter == null){  
//                mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();  
//            }  
//            mmDevice = mBluetoothAdapter.getRemoteDevice(macAddress);  
//            mBluetoothAdapter.cancelDiscovery();  
//            initSocket();                           
//            //adapter.cancelDiscovery();  
//            while (!connected && connetTime <= 10) {  
//                try {  
//                    socket.connect();  
//                    connected = true;  
//                } catch (IOException e1) {  
//                    connetTime++;  
//                    connected = false;  
//                    // 关闭 socket  
//                    try {  
//                        socket.close();  
//                        socket = null;  
//                    } catch (IOException e2) {  
//                        //TODO: handle exception    
//                        Log.e(TAG, "Socket", e2);  
//                    }  
//                } finally {  
//                    connecting = false;  
//                }  
//                //connectDevice();  
//            }  
//            // 重置ConnectThread   
//            //synchronized (BluetoothService.this) {  
//               //ConnectThread = null;  
//            //}  
//        }  
//      
//        public void cancel() {  
//            try {  
//                socket.close();  
//                socket = null;  
//            } catch (Exception e) {  
//                e.printStackTrace();  
//            } finally {  
//                connecting = false;  
//            }  
//        }  
//    }
//    
//    private void initSocket() {  
//        BluetoothSocket temp = null;  
//        try {              
//            Method m = mmDevice.getClass().getMethod(  
//                    "createRfcommSocket", new Class[] { int.class });  
//            temp = (BluetoothSocket) m.invoke(mmDevice, 1);//这里端口为1              
//        } catch (SecurityException e) {  
//            e.printStackTrace();  
//        } catch (NoSuchMethodException e) {  
//            e.printStackTrace();  
//        } catch (IllegalArgumentException e) {  
//            e.printStackTrace();  
//        } catch (IllegalAccessException e) {  
//            e.printStackTrace();  
//        } catch (InvocationTargetException e) {  
//            e.printStackTrace();  
//        }  
//        socket = temp;  
//    }  
}